function find():Array<string>{
    return;
}
// 更新
function update():number{
    return;
}
function run():void{
    // return;
    // return undefined;
    return null;
}

function run2():any{
    return '123';
}

function error(msg:string):never{
    throw new Error(msg);
}

function changdu(name:string){
    if(name.length>100){
        error('太长');
    }
}
